Sunday, 11 January 2015

Thursday, 8 January 2015

Prompted by my digging on Slopegraphs, I have pushed even further back than 1914 and found this - from Scribner's statistical atlas of the United States, showing by
graphic methods their present condition and their political, social and
industrial development by Fletcher W. Hewes and Henry Gannett. Published in 1883.

The Statistical Atlas for the previous census, published in 1870, did not have a plot like this.